U of M climatologist took the earth's temperature

"Making the case for global warming is like assembling a huge jigsaw puzzle -- the big picture emerges from many pieces. One of the early pieces of the global warming picture came from the work of University of Minnesota climatology professor Don Baker. His 45 years of measurements show an unmistakable pattern of rising soil temperatures. The U of M is recognizing Baker with a lifetime achievement award." Continue reading the story from Minnesota Public Radio.